Uncategorized tracing borken with smpi
Hello, I made a simple program in which 4 mpi ranks send data a two different intervals of time. Here description of what each of the ranks is programmed to do.
0 (host-0) => sleeps for 25 sec => sends X bytes to 1 1 (host-1) => sleeps for 25 sec => recv X bytes from 0 2 (host-0) => sleeps for 50 sec => sends X bytes to 3 3 (host-1) => sleeps for 50 sec => recv X bytes from 2
Depending on the configuration of the execution (speed of the links, and the amount of data exchanged) the communication between 0 <-> 1 and 2 <-> 3 can overlap, resulting in two communication using the same link.
The issue concerns the tracing during this kind of configuration.
I am interested in plotting the communication of the application but at the link level. Fortunately, simgrid has an option to do that
However, the paje trace fails to render the communications correctly.
The attached tarball contains two paje trace, one with overlapping
trace_buggy.paje and one without
We can see that the paje trace with communication overlap fails to render the first communication happening at 25.000 of the simulation.
The tarball also contains everything needed to run the code.